Kitchen sink



FIG. 1 is a top, front, left side perspective view of a kitchen sink showing my new design;

FIG. 2 is a top, rear, left side perspective view thereof;

FIG. 3 is a bottom left side perspective view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a front elevation view thereof;

FIG. 7 is a rear elevation view thereof;

FIG. 8 is a left side elevation view thereof; and,

FIG. 9 is a right side elevation view thereof.

The broken lines shown in the figures represent portions of the kitchen sink that form no part of the claimed design. 

CLAIM I claim the ornamental design for a kitchen sink, as shown and described. 